Malicious PDF — malware analysis report

Static analysis result for SHA-256 084e59c3528a7da4…

MALICIOUS

PDF

44.5 KB Created: 2021-05-17 10:18:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 897a825fe5cb6938d0f993c3dd668314 SHA-1: 8575f0439f9469d921e85a14fb44f5c896245142 SHA-256: 084e59c3528a7da4974bbda5f8ad827c167af1283ac0d805cb0008d234741e1f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to "Coin Master" game hacks, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate it's designed to redirect users to external content, likely for malicious purposes such as phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit user interest in game cheats to lead them to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/coin-master-time-hack-ios-game-hack PDF link annotation
    • http://www.sassrl.net/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.sassrl.net/images/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.sassrl.net/images/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://www.sassrl.net/images/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://www.sassrl.net/images/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sassrl.net/images/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.sassrl.net/images/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://www.sassrl.net/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.sassrl.net/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.sassrl.net/images/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://www.sassrl.net/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.sassrl.net/images/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://www.sassrl.net/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.sassrl.net/images/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://www.sassrl.net/images/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://www.sassrl.net/images/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://www.sassrl.net/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.sassrl.net/images/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • http://www.sassrl.net/images/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.sassrl.net/images/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004941.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4941 25104 bytes
SHA-256: dce1b07df140f365a1456ee5f992f17b7f9c408501d005a48cf70bdd0aca01fe
font_01_sfnt_off0000827d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827D 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C68 17976 bytes
SHA-256: 655a12c454514dd8530ca1f99360ddd50a64d293630b44ede153b337a3b108cc

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